This invention discloses a power supply
system and method for auxiliary equipment inside a smart tire, relating to the field of vehicle auxiliary equipment power supply technology. The
system includes a housing, a piezoelectric
energy harvesting component, an
energy management module, and a
backup power supply. The housing contains upper and
lower limit positions that are radially opposite to each other along the smart tire, and the piezoelectric
energy harvesting structure is located within the limit gap. During the non-grounded phase of the smart tire,
centrifugal force causes the piezoelectric structure to press against the
lower limit position and store elastic
potential energy. During the grounded phase, the equivalent centripetal acceleration decreases, causing it to release and rebound, generating
electricity. The generated
AC power is converted by a
rectifier module and then stored and preferentially utilized by the
energy management module. When the self-powered supply is insufficient, it automatically switches to the
backup power supply. By efficiently capturing grounding
impact energy and combining it with
hybrid power
supply management, the efficiency of in-tire
mechanical energy utilization and power supply continuity are significantly improved. Simultaneously, bidirectional limit protection enhances the reliability of the piezoelectric structure.